Thermometer.



R. W. MATTOX.

THERMOMETER. APPLICATION FILED MAR 29, 1909.

Patented July 6, 1909.

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`ROBERT W. MATTOX, 0F WEST TOCOI, FLORIDA,

Specification of Letters. Patent.A

vPatented July 6, 1909.

Application led March 29, 1909. Serial No. 486,557.

VTo all whoi'n 'it may concern:

Beit knownthat I, ROBERT W. MATTOX, a citizen of the United States, residing at West Toeoi, in the county oi' Clay and State ol Florida, hzive invented new and useful lmproveineiits in 'lliermometers, ol.wliich the lolloii'ine; is a specification. i

This invention relates to thermometers, and its object is to provide an improved device of this niitu're for indicating .the temperature oi' the contents of a tank, such for instance as a still iiiwhich t'urpentine is treated to produce spirits otturpentine.. ln this process great care must be exercised' to prevent the temperature `of the turpentine from rising aboverii critical point at which it is liable to earboiiize. Itis customary, therefore, to arrange a* thermometer passing liorizoiitally.

` through the well oi the still. into the interior oilthetank and havingitsl outer portion bent upwardly and -rovided with. the usual gradua-tcd seele.

storage when out of use, zindto enable this to be readily accomplished the thermometer proper is inserted into .a tube built into the wall of the still and having its closed inner end lo'ciited inside thetank.

coi'istructioi'i'by which the thermometer is maintained 11i a centiii-lposition 1n said tube, and also. to means whereby an alarm is sounded when the temperature of the tur` pentiijie reaches the danger point; all as hereiniil't'er set l'orth and particularly pointed out -in the claims. 1

In the accompanying drawings, Figure 1 is a iront elevation of lmy improved thermom eter es seen from the outside ofthe still. Erp 2 1s `aside elevation partly in section of the` fentire device, and F1g..3 is across section.

The tank 1which contains the turpe'ntine isinade of'eopper, and it is setin inosonry of suiteblethic-kness. A tube 3 is built into the masonry in a horizontal position and extends .through the wallet' the ta1ik,being externally screw-threaded at this fpointzto reccive the nuts 4,5, which clamp tlief'wall 1 tightly und form a {luid-tightjoint. On the 'inner end ol" the tube',.inside ot the tank, there -is screwed a'eap4 G ,hiilviiig .en e tension? siniilleriii .diameter than VtheY tub v Vwith ii thin wall so that the heat of the .tur-.l

-Tlie tube pentiiie efiiireadily penetrate it. is made ol bin-iss n iid llie'ciip is prel'eridilycoppe1',\vhile,l pi'el'er lo niiilie the nuts olbroiize,

` t is vsometimes 1i'ecessary`toj remove the thermometer for repairs lor foi ing, in theangle thereof. d melde so thatnone of these materials will a'll'ect the turperitme injuriously.

Inside the tube 3 is a protecting sleeve 8 oi". any suitable metal, somewhat sin aller than the tube 3 so as to be out ol' contziriiheiewith and having` near its inner end :i pi'ojei tion 9, preferably a collar ii'itegriil willi the sleeveI which has iin easy sliding 'lit in the bore of the cylindrical tube '.llie inner end of the sleeve is screw-lhreaded internally to receive fi tubular end piece 1() prel'eiiililj,Y made of'steel and having a reduced portion 10 which is closed at its end and lits with :i sliding fit into the extension 7 ol the cap (i. This end piece can be screwed in or out in the sleeve, to obtain the proper.adjustment in length'and cause the portion 11) to rein-li lo the end ol the extension. The collar Qi ein ters the sleeve when it is inserted into the tube and insures the projection 10 enteringthe extension 7. The .outer end of the sleeve is provided with tubular plug` 11 which 'is screu'edinto it iiiid has si collar 12 pi'el'erably beveled to center the plug in the end ol' the tube 3. A gland 13 .is slippedover the outerend of the plug* aiidbears against the collar, being internally 4screw-threiideil i to engage l with threads on the outside oi' the tube C. l y My invention' relates to certain details of prefer to form a countersink in the masonry around the'end oi the tube. to permit the gland to enterso that its flange 14, may bear against the outside of the wall andchiinili the tube firmly in position. A portion ol the plug projects beyond the gland, and is preleiably screw-threaded to receive the lower .endA of en upright casing 15 preferably V- shaped in cross section'1 with closed to p and bottom.

The tlieiiiionieter`tube is ol' glass, and is bent at right angles, as shown. The horizontiil leg 1li is insertedfthrough the plug 1,1 and passes through ,it guide 17 in the sleeve into the reduced portion 1(1"01 the end piece 11), where it is preferably surrounded by a bath ofniercury to insure a quick and perfect transmission of the: heat from the contents ol the tank through the 'cap and end piece to the thermometer tube and its contained colV- umn of mercury. The upright leg 18 oi' the glass tube 'extends up parallel with the crisw The adjiice-nt surfaces of thel interior ol' the. easing are provided vvithtlie usuel graduiitioi'is, as shown. A gloss coverl) is placed over the casing, the glass being held in :i lranie 2() which is pref eriibly attached to the easing by a pin 21 at the bottom entering,r a sorbet in the easing. and by ya thumb nut 22 at the top overlapv)ing the end of the traine. Fir. 2 shows how the cover can be removed when the nut is unserewed, the cover 'being shown as broken in two, with. its upper part in place, and its lower part in the art ol" beiney removed. 'lo protect the I,gglass in transit, a metal door 23 is hinged to the easing', or to the frame 20, and is provided with suitable tastening devices, such as the perforated lugs 24 to receive a padlock.

Two terminals are sealed into the thermometer tube,one at `the lower end where it will always be in contact with the in'ereury, and the other at the graduation imli'eatinf` 306 degrees Fahrenheit, which is the danger point. The turpentine inust notY be permitted to go above 316 degrees, and therefore 306 is taken as the danger point in order that vif the temperature rises to `this point steps may be taken to reduce the heat before it gets to A316. In circuit with the two lterminals is a battery 25and an electric bell 26, so that when the mercury rises to 306 the circuit will be closed and the bell will ring ,and Warn the attendant to pull his fire.

Having thus described my invention what l claim is 1: The combination with a still, of a tube extending through the Wall thereof, nuts on said tube clamping said Wall, a cap screwed on the inner end oi' said tube and having a reduced extension, a sleeve inside said tube and' out of contact therewith, a tubular end pieeescrewed into the end ot' said sleeve and raving a portion fitting into said extension,

and a projection on said sleeve fitting' the bore of the tube.

2. The combination With a still, ot a tube extendingl through 'the wall thereof, nuts on said tube clam ingn said wall, a cap-screwed on the inner en oi' said tube and having a reduced extension, a sleeve inside said tube, a tubular end piece screwed into the end of said sleeve and adjustable lengthwise therein and havingl a portion littine; the said extension, a tnbular-plug in the outer end ol' said sleeve having a Collar centering; said sleeve in said tube, and a gland sere\.'ed on the outside ol' said tube and bearing' against said cellar.

S. 'lhe eoi'i'ibination with a still, ol' a tube extending' through the wall thereof, nuts on said tube clamping' saidnall, a eap screwed on the inner end olI said tube and liaviirnr a reduced extension, a sleeve inside said tube, t, tubular end pieee screwed into the end ol' said sleeve and adjustable lengrtlnrise therein and having' a reduced portion fitting' the said extension, a tubular plug in the outer end .oll said sleeve having a collar centering' said sleeve-'in said tube, and a gland screwed on the outside of said tube and bearing' against said collar,.a casing attached to the outer end ol` said plug, and a thermometer tube havine' one leg inserted in said sleeve and the other located in said casing.

4. The combination wit-'h a still, ol' a tube extending' through the wall thereof, nuts on said tube clamping said wall, a rap serewed on the inner end ol' said tube, a sleeve inside of said tube having a projection 'tilting the bore thereof, a longitudinally adjustable end `piece l'or said sleeve, a easing supported on the outer end olA said tube and provided with a glass l'ront and a graduated scale, a therinolneter tube having a horizontal lee; in said sleeve and a vertical leg in said easing', terininals sealed into the vertical leg' olI said tubo, one of which is loeated at the danger point ot' the scale, an electric alarm, and a battery in circuit with said alarin and said terminals,-

ln testimony whereoil l have signed tn v naine to this specilication in the prcsenee olI two subscribing witnesses.

ROBERT W'. MA'ITOX. nWitnesses:

GEO. I. WHIT'raEsEY, 'lnoMAs DURANT. 

